/Engine/Plugins/Runtime/RigVM/Source/RigVMDeveloper/Public/RigVMCompiler/RigVMCompiler.h
Follows assignment expressions to find the source ref counted containers since ref counted containers are not copied for assignments. this is currently only used for arrays.
static const [FRigVMVarExprAST](API\Plugins\RigVMDeveloper\RigVMCompiler\FRigVMVarExprAST) * GetSourceVarExpr ( const [FRigVMExprAST](API\Plugins\RigVMDeveloper\RigVMCompiler\FRigVMExprAST) * InExpr )